Pinned staff members not staying pinned

Why do the staff members I pin in my staff list not stay anymore.

Used to be when I clicked the pin next to a staff name, the next time I logged in they would still be there.  Now, when I pin someone, if I even just click to the calendar or customers or anywhere else, the pin goes away.  I have a long list of staff and this is getting really frustrating

Why?!?!